Unknown number related questions in linear equations

Unknown number related questions in linear equations

Unknown sometimes is mysterious or even scary, but let us show you unknown can be fun too. You will find more linear equations word problems related to unknown number in this lesson.
Basic concepts: Applications of linear equations, Solving systems of linear equations by graphing, Solving systems of linear equations by elimination, Solving systems of linear equations by substitution,
Related concepts: System of linear equations, System of linear-quadratic equations, Graphing systems of linear inequalities,

Lessons

  • 1.
    Two numbers have a sum of 24. Find the two numbers if the second number is 6 times the first one.
  • 2.
    The sum of four times one number plus two times a second number is eight. The sum of three times the first number plus 5 times the second number is 24. Find the numbers.
  • 3.
    Sarah is three times as old as her sister Jenny. In nine years the sum of their ages will be 26. How old are they now?
Do better in math today
Get Started Now
17.
Simultaneous Equations
17.1
Determining number of solutions to linear equations
17.2
Solving simultaneous linear equations by graphing
17.3
Solving simultaneous linear equations by elimination
17.4
Solving simultaneous linear equations by substitution
17.5
Money related questions in linear equations
17.6
Unknown number related questions in linear equations
17.7
Distance and time related questions in linear equations
17.8
Rectangular shape related questions in linear equations
GCE O-Level Maths
Don't just watch, practice makes perfect.